"I truly believe if they can't get him help, he won't live to see his 24th birthday," he said, according to the Dallas Morning News' Kate Hairopoulos.
Browns owner Jimmy Haslam also expressed concern for Johnny Manziel as a person, not a football player, despite the quarterback's tenuous relationship with the franchise.
"Johnny has not responded to us but we'll do anything we can to help him personally and our thoughts and prayers are with Johnny and his family," Haslam said, per Rapoport. "We're not worried about Johnny Manziel the football player, we're worried about Johnny Manziel the person, and I think that's all we need to say on the issue."
Per Lopez, Manziel is unlikely to play for Cleveland next season.